Php 知道我的代码为什么一直产生语法错误吗？

我似乎找不到需要分号或“}”的地方

for ($period=1; $period<6; $period++)
  {
     echo "<tr><td>".$period."</td>";  
     for ($room=0; $room<sizeof($rooms_array); $room++)
       {
         $sql = "SELECT Username FROM Booking WHERE RoomID ='".$rooms_array[$room]."' AND Period = '".$period."' AND Date = '".$sentdate."'";
         $result= sqlite_query($con,$sql);
         $row = sqlite_fetch_array($result);
         if($row['Username']==$_SESSION['Username'])
           {
             echo "<td>Booked By ".$row['Username']."</td>"
           }
       }
   }    

?>

（$period=1；$period）的

---

echo语句后需要分号：

{echo "<td>Booked By ".$row['Username']."</td>";}

{echo“由“$row['Username']”预订；}

如果采用更清晰的块/缩进样式，这样的错误可能更容易发现。代码很难阅读

例如：

for ($period=1; $period<6; $period++)
{
    echo "<tr><td>".$period."</td>";  
    for ($room=0; $room<sizeof($rooms_array); $room++)
    {
        $sql = "SELECT Username FROM Booking WHERE RoomID ='".$rooms_array[$room]."' AND Period = '".$period."' AND Date = '".$sentdate."'";
        $result= sqlite_query($con,$sql);
        $row = sqlite_fetch_array($result);
        if($row['Username']==$_SESSION['Username'])
        {
            echo "<td>Booked By ".$row['Username']."</td>";
        }
    }
}    

---

对于（$period=1；$period缺少
；
此处：

{echo "<td>Booked By ".$row['Username']."</td>"}
                                              ^

{echo“由“$row['Username']”预订”
^
echo“预订人”.“$row['Username']”。“
缺少分号
会出现什么语法错误？如果格式化代码，您可能会发现在缺少内容时更容易直观地检测